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Stress transport on the grid, forward from launch points, and on particles - #833

Merged

lmoresi merged 33 commits into

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feature/forward-parallel

Oct 8, 2026

Commits on Sep 9, 2026
- The history manager commits the flux and shifts its own levels
  
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- The Eulerian SUPG manager can transport its own history on the grid
  
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- Transport the stress history with the theta rule, and separate the two managers in the test
  
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  5ae090c
- Expose the transport blend and say what it is
  
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  ce70083
- A Stokes solve can carry its viscoelastic stress on the grid: stress_transport
  
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Commits on Sep 10, 2026
- Pin the case where the stress both moves and evolves
  
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- Navier-Stokes carries a viscoelastic stress, with either history
  
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- The theta rule reads the stress history for its stored flux level
  
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Commits on Sep 11, 2026
- Split the viscoelastic pre-solve around the build, so multigrid survives the order ramp (#727)
  
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- The transport takes an inflow condition, applied by the sign of the normal velocity
  
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- Merge origin/development: the particle history commits its own flux
  
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- The integration-point history carries the stress instead of rebuilding it (#732)
  
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- inflow_value lives on the base history, so no flavour drops it in silence (#733)
  
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  cc57ca9
Commits on Sep 12, 2026
- DEVSS on the Stokes momentum flux, opt-in, for a discontinuous elastic stress
  
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  b5bfc29
Commits on Sep 14, 2026
- Let every stress history carry the exponential integrator (#739)
  
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  b923356
- Refresh the integrator coefficients before the stress history first carries (#740, #741)
  
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  3e2c9e7
- Carry a strain-rate history along the characteristic for ETD-2 on the integration-point flavour
  
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  5e1266e
Commits on Sep 15, 2026
- Give the integration-point history a true inflow value at restored departure points (#745)
  
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  f6d3259
- Give the viscoelastic element an objective rate and a solvent viscosity
  
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  6023fba
Commits on Sep 18, 2026
- Make the DEVSS pair cancel on a plain Stokes solve as well (#754)
  
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  9485e8e
Commits on Sep 20, 2026
- Restore out-of-bounds points on a file-read mesh with the facet fallback
  
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  00537fd
- Hold the integration-point stress history below Courant one, and watch the conformation (#737, #768)
  
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  71bb82d
Commits on Sep 21, 2026
- Carry the stress forward from launch points inside the cells: stress_transport = "forward"
  
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  eba681f
- Run the forward stress history in parallel
  
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  c085025
- Let the integration-point and forward stress histories be snapshotted and restored
  
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  30156c9
Commits on Sep 22, 2026
- Keep the read-back smoothing out of the forward history's snapshot, and run the restart test in CI
  
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- Apply the branch-level adversarial review before the PR
  
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- Fold the stress-transport tests into development's whole-band CI, slow ones tier C
  
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  4041dfb
Commits on Sep 23, 2026
- Make the particle Lagrangian stress history an equal citizen: stress_transport = "lagrangian"
  
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- Add a swarm (Lagrangian) advection-diffusion solver: AdvDiffusionSwarm
  
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- Default the swarm history proxy to degree 1, so it holds a boundary-crossing flow
  
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  6287c09
Commits on Oct 6, 2026
- Merge development into the stack root
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  720e46f
Commits on Oct 7, 2026
- _geometry_stamp reads mesh.X.coords, as Charter S7 requires
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Commits

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Commits on Oct 7, 2026